using Dalamud.Game.ClientState.Objects.Types;
using HSUI.Config;
using HSUI.Enums;
using HSUI.Helpers;
using HSUI.Interface.GeneralElements;
using Dalamud.Bindings.ImGui;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Runtime.InteropServices;
using FFXIVClientStructs.FFXIV.Client.UI.Agent;

namespace HSUI.Interface.Party
{
    public class PartyFramesHud : DraggableHudElement, IHudElementWithMouseOver, IHudElementWithPreview, IHudElementWithVisibilityConfig
    {
        private PartyFramesConfig Config => (PartyFramesConfig)_config;
        public VisibilityConfig VisibilityConfig => Config.VisibilityConfig;
        private PartyFramesConfigs Configs;

        private Vector2 _contentMargin = new Vector2(2, 2);
        private static readonly int MaxMemberCount = 9; // 8 players + chocobo

        // layout
        private Vector2 _origin;
        private LayoutInfo _layoutInfo;
        private uint _memberCount = 0;
        private bool _layoutDirty = true;

        private readonly List<PartyFramesBar> bars;
        private LabelHud _titleLabelHud;

        private bool Locked => !ConfigurationManager.Instance.IsConfigWindowOpened;


        public PartyFramesHud(PartyFramesConfig config, string displayName) : base(config, displayName)
        {
            Configs = PartyFramesConfigs.GetConfigs();

            config.ValueChangeEvent += OnLayoutPropertyChanged;
            Configs.HealthBar.ValueChangeEvent += OnLayoutPropertyChanged;
            Configs.HealthBar.ColorsConfig.ValueChangeEvent += OnLayoutPropertyChanged;

            bars = new List<PartyFramesBar>(MaxMemberCount);
            for (int i = 0; i < bars.Capacity; i++)
            {
                PartyFramesBar bar = new PartyFramesBar("DelvUI_partyFramesBar" + i, Configs);
                bar.OpenContextMenuEvent += OnOpenContextMenu;

                bars.Add(bar);
            }

            _titleLabelHud = new LabelHud(config.ShowPartyTitleConfig);

            PartyManager.Instance.MembersChangedEvent += OnMembersChanged;
            UpdateBars(Vector2.Zero);
        }

        protected override void InternalDispose()
        {
            foreach (var bar in bars)
            {
                try { bar.Dispose(); }
                catch (Exception ex) { Plugin.Logger.Error($"Error disposing PartyFramesBar: {ex.Message}"); }
            }
            bars.Clear();

            _config.ValueChangeEvent -= OnLayoutPropertyChanged;
            Configs.HealthBar.ValueChangeEvent -= OnLayoutPropertyChanged;
            Configs.HealthBar.ColorsConfig.ValueChangeEvent -= OnLayoutPropertyChanged;
            PartyManager.Instance.MembersChangedEvent -= OnMembersChanged;
        }

        private unsafe void OnOpenContextMenu(PartyFramesBar bar)
        {
            if (bar.Member == null || Plugin.ObjectTable.LocalPlayer == null)
            {
                return;
            }

            if (PartyManager.Instance.PartyListAddon == null || PartyManager.Instance.HudAgent == IntPtr.Zero)
            {
                return;
            }

            int addonId = PartyManager.Instance.PartyListAddon->AtkUnitBase.Id;
            AgentModule.Instance()->GetAgentHUD()->OpenContextMenuFromPartyAddon(addonId, bar.Member.Index);
        }

        private void OnLayoutPropertyChanged(object sender, OnChangeBaseArgs args)
        {
            if (args.PropertyName == "Size" ||
                args.PropertyName == "FillRowsFirst" ||
                args.PropertyName == "BarsAnchor" ||
                args.PropertyName == "Padding" ||
                args.PropertyName == "Rows" ||
                args.PropertyName == "Columns")
            {
                _layoutDirty = true;
            }
        }

        private void OnMembersChanged(PartyManager sender)
        {
            UpdateBars(_origin);
        }

        public void UpdateBars(Vector2 origin)
        {
            uint memberCount = PartyManager.Instance.MemberCount;
            uint row = 0;
            uint col = 0;

            for (int i = 0; i < bars.Count; i++)
            {
                PartyFramesBar bar = bars[i];
                if (i >= memberCount)
                {
                    bar.Visible = false;
                    continue;
                }

                // update bar
                IPartyFramesMember member = PartyManager.Instance.SortedGroupMembers.ElementAt(i);
                bar.Member = member;
                bar.Visible = true;

                // anchor and position
                CalculateBarPosition(origin, Size, out var x, out var y);
                bar.Position = new Vector2(
                    x + Configs.HealthBar.Size.X * col + (Configs.HealthBar.Padding.X - 1) * col,
                    y + Configs.HealthBar.Size.Y * row + (Configs.HealthBar.Padding.Y - 1) * row
                );

                // layout
                if (Config.FillRowsFirst)
                {
                    col = col + 1;
                    if (col >= _layoutInfo.TotalColCount)
                    {
                        col = 0;
                        row = row + 1;
                    }
                }
                else
                {
                    row = row + 1;
                    if (row >= _layoutInfo.TotalRowCount)
                    {
                        row = 0;
                        col = col + 1;
                    }
                }
            }
        }

        private void CalculateBarPosition(Vector2 position, Vector2 spaceSize, out float x, out float y)
        {
            x = position.X;
            y = position.Y;

            if (Config.BarsAnchor == DrawAnchor.Top ||
                Config.BarsAnchor == DrawAnchor.Center ||
                Config.BarsAnchor == DrawAnchor.Bottom)
            {
                x += (spaceSize.X - _layoutInfo.ContentSize.X) / 2f;
            }
            else if (Config.BarsAnchor == DrawAnchor.TopRight ||
                Config.BarsAnchor == DrawAnchor.Right ||
                Config.BarsAnchor == DrawAnchor.BottomRight)
            {
                x += spaceSize.X - _layoutInfo.ContentSize.X;
            }

            if (Config.BarsAnchor == DrawAnchor.Left ||
                Config.BarsAnchor == DrawAnchor.Center ||
                Config.BarsAnchor == DrawAnchor.Right)
            {
                y += (spaceSize.Y - _layoutInfo.ContentSize.Y) / 2f;
            }
            else if (Config.BarsAnchor == DrawAnchor.BottomLeft ||
                Config.BarsAnchor == DrawAnchor.Bottom ||
                Config.BarsAnchor == DrawAnchor.BottomRight)
            {
                y += spaceSize.Y - _layoutInfo.ContentSize.Y;
            }
        }

        private void UpdateBarsPosition(Vector2 delta)
        {
            foreach (PartyFramesBar bar in bars)
            {
                bar.Position = bar.Position + delta;
            }
        }

        public void StopPreview()
        {
            Config.Preview = false;
            PartyManager.Instance?.UpdatePreview();

            foreach (PartyFramesBar bar in bars)
            {
                bar.StopPreview();
            }
        }

        protected override (List<Vector2>, List<Vector2>) ChildrenPositionsAndSizes()
        {
            return (new List<Vector2>() { Config.Position + Size / 2f }, new List<Vector2>() { Size });
        }

        public void StopMouseover()
        {
            foreach (PartyFramesBar bar in bars)
            {
                bar.StopMouseover();
            }
        }

        private Vector2 Size => new Vector2(
            Config.Columns * Configs.HealthBar.Size.X + (Config.Columns - 1) * Configs.HealthBar.Padding.X,
            Config.Rows * Configs.HealthBar.Size.Y + (Config.Rows - 1) * Configs.HealthBar.Padding.Y
        );

        private void UpdateLayout(Vector2 origin)
        {
            Vector2 contentStartPos = origin + Config.Position;
            uint count = PartyManager.Instance.MemberCount;

            if (_layoutDirty || _memberCount != count)
            {
                _layoutInfo = LayoutHelper.CalculateLayout(
                    Size,
                    Configs.HealthBar.Size,
                    count,
                    Configs.HealthBar.Padding,
                    Config.FillRowsFirst
                );
                UpdateBars(contentStartPos);
            }
            else if (_origin != contentStartPos)
            {
                UpdateBarsPosition(contentStartPos - _origin);
            }

            _layoutDirty = false;
            _origin = contentStartPos;
            _memberCount = count;
        }

        public override void DrawChildren(Vector2 origin)
        {
            if (!_config.Enabled)
            {
                return;
            }

            // area bg
            if (Config.Preview)
            {
                AddDrawAction(StrataLevel.LOWEST, () =>
                {
                    ImDrawListPtr drawList = ImGui.GetWindowDrawList();
                    Vector2 bgPos = origin + Config.Position - _contentMargin;
                    Vector2 bgSize = Size + _contentMargin * 2;

                    drawList.AddRectFilled(bgPos, bgPos + bgSize, 0x66000000);
                    drawList.AddRect(bgPos, bgPos + bgSize, 0x66FFFFFF);
                });
            }

            uint count = PartyManager.Instance.MemberCount;
            if (count < 1)
            {
                return;
            }

            UpdateLayout(origin);

            // draw bars
            // check borders to determine the order in which the bars are drawn
            // which is necessary for grid-like party frames

            IGameObject? target = Plugin.TargetManager.SoftTarget ?? Plugin.TargetManager.Target;
            int targetIndex = -1;
            int enmityLeaderIndex = -1;
            int enmitySecondIndex = -1;

            List<int> raisedIndexes = new List<int>();
            List<int> cleanseIndexes = new List<int>();
            List<int> whosTalkingIndexes = new List<int>();

            for (int i = 0; i < count; i++)
            {
                IPartyFramesMember? member = bars[i].Member;

                if (member != null)
                {
                    // whos talking
                    if (Configs.Icons.WhosTalking.ChangeBorders && member.WhosTalkingState != WhosTalkingState.None)
                    {
                        whosTalkingIndexes.Add(i);
                        continue;
                    }

                    // target
                    if (target != null && member.ObjectId == target.GameObjectId)
                    {
                        targetIndex = i;
                        continue;
                    }

                    // cleanse
                    bool cleanseCheck = true;
                    if (Configs.Trackers.Cleanse.CleanseJobsOnly)
                    {
                        cleanseCheck = Utils.IsOnCleanseJob();
                    }

                    if (Configs.Trackers.Cleanse.Enabled && Configs.Trackers.Cleanse.ChangeBorderCleanseColor && member.HasDispellableDebuff && cleanseCheck)
                    {
                        cleanseIndexes.Add(i);
                        continue;
                    }

                    // raise
                    if (Configs.Trackers.Raise.Enabled && Configs.Trackers.Raise.ChangeBorderColorWhenRaised && member.RaiseTime.HasValue)
                    {
                        raisedIndexes.Add(i);
                        continue;
                    }

                    // enmity
                    if (Configs.HealthBar.ColorsConfig.ShowEnmityBorderColors)
                    {
                        if (member.EnmityLevel == EnmityLevel.Leader)
                        {
                            enmityLeaderIndex = i;
                            continue;
                        }
                        else if (Configs.HealthBar.ColorsConfig.ShowSecondEnmity && member.EnmityLevel == EnmityLevel.Second &&
                            (count > 4 || !Configs.HealthBar.ColorsConfig.HideSecondEnmityInLightParties))
                        {
                            enmitySecondIndex = i;
                            continue;
                        }
                    }
                }

                // no special border
                AddDrawActions(bars[i].GetBarDrawActions(origin));
            }

            // special colors for borders

            // 2nd enmity
            if (enmitySecondIndex >= 0)
            {
                AddDrawActions(bars[enmitySecondIndex].GetBarDrawActions(origin, Configs.HealthBar.ColorsConfig.EnmitySecondBordercolor));
            }

            // 1st enmity
            if (enmityLeaderIndex >= 0)
            {
                AddDrawActions(bars[enmityLeaderIndex].GetBarDrawActions(origin, Configs.HealthBar.ColorsConfig.EnmityLeaderBordercolor));
            }

            // raise
            foreach (int index in raisedIndexes)
            {
                AddDrawActions(bars[index].GetBarDrawActions(origin, Configs.Trackers.Raise.BorderColor));
            }

            // target
            if (targetIndex >= 0)
            {
                AddDrawActions(bars[targetIndex].GetBarDrawActions(origin, Configs.HealthBar.ColorsConfig.TargetBordercolor));
            }

            // cleanseable debuff
            foreach (int index in cleanseIndexes)
            {
                AddDrawActions(bars[index].GetBarDrawActions(origin, Configs.Trackers.Cleanse.BorderColor));
            }

            // whos talking
            foreach (int index in whosTalkingIndexes)
            {
                IPartyFramesMember? member = bars[index].Member;
                if (member != null)
                {
                    AddDrawActions(bars[index].GetBarDrawActions(origin, Configs.Icons.WhosTalking.ColorForState(member.WhosTalkingState)));
                }
                else
                {
                    AddDrawActions(bars[index].GetBarDrawActions(origin));
                }
            }

            // extra elements
            foreach (PartyFramesBar bar in bars)
            {
                AddDrawActions(bar.GetElementsDrawActions(origin));
            }

            AddDrawAction(Config.ShowPartyTitleConfig.StrataLevel, () =>
            {
                Config.ShowPartyTitleConfig.SetText(PartyManager.Instance.PartyTitle);
                _titleLabelHud.Draw(origin + Config.Position);
            });
        }
    }

    #region utils
    public struct PartyFramesConfigs
    {
        public PartyFramesHealthBarsConfig HealthBar;
        public PartyFramesManaBarConfig ManaBar;
        public PartyFramesCastbarConfig CastBar;
        public PartyFramesIconsConfig Icons;
        public PartyFramesBuffsConfig Buffs;
        public PartyFramesDebuffsConfig Debuffs;
        public PartyFramesTrackersConfig Trackers;
        public PartyFramesCooldownListConfig CooldownList;

        public PartyFramesConfigs(
            PartyFramesHealthBarsConfig healthBar,
            PartyFramesManaBarConfig manaBar,
            PartyFramesCastbarConfig castBar,
            PartyFramesIconsConfig icons,
            PartyFramesBuffsConfig buffs,
            PartyFramesDebuffsConfig debuffs,
            PartyFramesTrackersConfig trackers,
            PartyFramesCooldownListConfig cooldownList)
        {
            HealthBar = healthBar;
            ManaBar = manaBar;
            CastBar = castBar;
            Icons = icons;
            Buffs = buffs;
            Debuffs = debuffs;
            Trackers = trackers;
            CooldownList = cooldownList;
        }

        public static PartyFramesConfigs GetConfigs()
        {
            return new PartyFramesConfigs(
                ConfigurationManager.Instance.GetConfigObject<PartyFramesHealthBarsConfig>(),
                ConfigurationManager.Instance.GetConfigObject<PartyFramesManaBarConfig>(),
                ConfigurationManager.Instance.GetConfigObject<PartyFramesCastbarConfig>(),
                ConfigurationManager.Instance.GetConfigObject<PartyFramesIconsConfig>(),
                ConfigurationManager.Instance.GetConfigObject<PartyFramesBuffsConfig>(),
                ConfigurationManager.Instance.GetConfigObject<PartyFramesDebuffsConfig>(),
                ConfigurationManager.Instance.GetConfigObject<PartyFramesTrackersConfig>(),
                ConfigurationManager.Instance.GetConfigObject<PartyFramesCooldownListConfig>()
            );
        }


    }
    #endregion
}